Shoulder arthroplasty trial device

ABSTRACT

A arthroplasty trial tool for a human shoulder can include a handle, a first sensor, and a user interface. The handle can include a first end and a second end opposite the first end. The first sensor can produce a first sensor signal as a function of a sensed shoulder condition. The user interface can be configured to display a first value as a function of the first sensor signal.

CLAIM OF PRIORITY

This application claims the benefit of U.S. Provisional PatentApplication Ser. No. 62/440,583, filed on Dec. 30, 2016, the benefit ofpriority of which is claimed hereby, and which is incorporated byreference herein in its entirety.

FIELD

The present subject matter relates to orthopedic procedures and, moreparticularly, to assemblies and systems that can aid in shoulderprocedures.

BACKGROUND

The shoulder joint is a complex joint with the scapula, clavicle and thehumerus all coming together to enable a wide range of movement, at leastin a properly functioning joint. In a properly functioning shoulderjoint the head of the humerus fits into a shallow socket in the scapula,typically referred to as the glenoid. Articulation of the shoulder jointinvolves movement of the humeral head in the glenoid, with the structureof the mating surfaces and surrounding tissues providing a wide range ofmotion.

The shoulder joint can undergo degenerative changes caused by variousissues, such as rheumatoid arthritis, osteoarthritis, rotator cuffarthroplasty, vascular necrosis, or bone fracture. When severe jointdamage occurs and no other means of treatment is found to be effective,a total, partial, or reverse shoulder replacement or reconstruction maybe necessary. Total shoulder replacements can involve a humeralprosthetic, including a stem and a head portion used to replace thenatural humeral head. Total shoulder replacements will also typicallyinvolve resurfacing of the glenoid with a prosthetic implant. Theglenoid implant generally will include an articulating cup shaped toreceive the prosthetic humeral head. A reversal shoulder replacement(arthroplasty) involves a different set of humeral and glenoidreplacement prosthetics. In a reverse shoulder the humeral componentincludes a cup shaped articular surface attached to a stem implantedinto the humerus, while a spherical glenoid component is used to providean articular surface for the humeral cup.

OVERVIEW

During shoulder arthroplasty surgery, the components of the prosthesisare matched with the bio-kinematics of the patient in an effort tomaintain or restore a natural range of motion of a healthy shoulderjoint. Patient specific instrumentation can assist a surgeon in planningand implementing a shoulder arthroplasty to restore naturalbio-kinematics. However, even with the multitude of advances inprosthetic components and patient specific instrumentation, restoring afull range of motion can remain difficult, especially for a surgeon whodoes not regularly perform shoulder replacements.

Even current surgical standards are often vague, providing guidance suchas joint tension should be 50/50 laxity or the joint should be “stable”throughout the range of motion. It is common for the current surgicalstandards to use un-quantified subjective measures, such as if the fitis “too tight,” soft tissue releases may be performed. Withoutsignificant experience, such guidance is of little practical use inensuring successful outcomes.

The systems, devices, methods, and instruments discussed herein canprovide quantitative measurements to assist surgeons in determiningwhether trial prosthetic devices may provide a patient with desirableoutcomes. Providing quantitative values representative of joint tensionand/or range of motion, can allow for development of definitivestandards of care that routinely result in successful outcomes.Quantitative measurements of certain parameters critical to providing afunctional joint also allow for surgeons to knowingly account to patientspecific issues, rather than the present vague “feel” that only the mostexperienced surgeons are likely to use successfully.

While the above discusses issues and procedures specific to shoulderreplacement procedures, discussion of the following systems, devices,methods, and instruments is also applicable for use in other jointreplacement procedures, such as total hip arthroplasty (THA) or totalknee arthroplasty (TKA).

To further illustrate the apparatuses and systems disclosed herein, thefollowing non-limiting examples are provided:

Example 1 is an arthroplasty trial tool for a human shoulder comprising:a handle comprising a first end and a second end opposite the first end,the first end comprising: a first sensor configured to produce a firstsensor signal based on a sensed condition of the human shoulder when thefirst end engages a humeral-glenoid interface of the human shoulder; anda user interface disposed on the handle between the first end and thesecond end, the user interface configured to display a first valueindicative of stability of the shoulder based on the first sensorsignal.

In Example 2, the subject matter of Example 1 optionally includes thesecond end further comprising: a second sensor configured to produce asecond sensor signal based on a second sensed condition of the humanshoulder when the second end engages the humeral-glenoid interface, thesecond sensor signal indicative of stability of the shoulder.

In Example 3, the subject matter of Example 2 optionally includeswherein the user interface is configured to display a second value basedon the second sensor signal.

In Example 4, the subject matter of any one or more of Examples 2-3optionally include wherein at least one of the first sensor and thesecond sensor comprises a force sensor.

In Example 5, the subject matter of Example 4 optionally includeswherein the user interface is configured to display a force value basedon at least one of the first sensor signal and the second sensor signal,wherein the force value is indicative of stability of thehumeral-glenoid interface.

In Example 6, the subject matter of any one or more of Examples 1-5optionally include the user interface further comprising: a lightemitting diode (LED) display configured to display a numerical valuerepresenting at least one of the first sensor signal and the secondsensor signal.

In Example 7, the subject matter of Example 6 optionally includeswherein the LED display is configured to display a first numerical valuerepresenting the first sensor signal and a second numerical valuerepresenting the second sensor signal.

In Example 8, the subject matter of any one or more of Examples 1-7optionally include wherein the first end comprises a first size that isdifferent from a second size of the second end.

In Example 9, the subject matter of any one or more of Examples 1-8optionally include the first end further comprising: a convex sideengageable with a concave portion of the humeral-glenoid interface; anda concave side engageable with a convex portion of the humeral-glenoidinterface.

In Example 10, the subject matter of any one or more of Examples 1-9optionally include wherein the humeral-glenoid interface comprises oneor more trial components associated with a shoulder replacementprosthesis.

Example 11 is an arthroplasty trial system for a human shoulder, thetrial system comprising: a set of implants comprising a humeral implantand a glenoid implant; a trial tool comprising: a body comprising afirst end and a second end; a spoon coupled to the first end, the spoonengageable with the set of implants, the spoon comprising: a sensor toproduce a sensor signal based on a condition of the set of implants whenthe spoon engages the set of implants; and a user interface located onthe body and configured to, based on the first sensor signal, display avalue indicative of the condition of the set of implants.

In Example 12, the subject matter of Example 11 optionally includeswherein the value displayed is a force value indicative of stability ofthe human shoulder including the set of implants.

In Example 13, the subject matter of any one or more of Examples 11-12optionally include a second spoon coupled to the second end of the body,the second spoon including a second sensor configured to produce asecond sensor signal based on a second condition of the set of implantswhen the second spoon engages the set of implants.

In Example 14, the subject matter of Example 13 optionally includeswherein the user interface is configured to display a second value basedon the second sensor signal, the displayed second value indicative ofstability of the human shoulder including the set of implants.

In Example 15, the subject matter of any one or more of Examples 11-14optionally include wherein the first spoon comprises a first size thatis different from a second size of the second spoon.

In Example 16, the subject matter of any one or more of Examples 11-15optionally include a second set of implants comprising a second humeralimplant and a second glenoid implant, the second humeral implant havinga second humeral implant size that is different than a size of thehumeral implant.

In Example 17, the subject matter of Example 16 optionally includeswherein the first spoon is configured to engage the second set ofimplants to produce a second sensor signal based on a second conditionof the second set of implants.

Example 18 is a method of evaluating trial components, comprising:inserting a first end of a trial tool into a shoulder of patientadjacent to a first trial component; producing a first sensor signalbased on a condition of the first trial component installed on theshoulder using the trial tool; producing, based on the first sensorsignal, a display on the trial tool representing the condition of thefirst trial component indicative of stability of the shoulder; andselecting the first trial component based on the display.

In Example 19, the subject matter of Example 18 optionally includessecuring the first trial component to a glenoid of the shoulder of thepatient; securing a second trial component to a humorous of the shoulderof the patient; and producing a first sensor signal based on a conditionof the first trial component and the second trial component using afirst end of the trial tool; and producing, based on the first sensorsignal, a display representing the condition of the first trialcomponent and the second trial component using a second end of the trialtool.

In Example 20, the subject matter of any one or more of Examples 18-19optionally include adjusting the first trial component based on thedisplay, wherein adjusting the first trial component comprises one ormore of moving the first trial component, rotating the first trialcomponent, moving the second trial component, rotating the second trialcomponent, inserting a new first trial component, and inserting a newsecond trial component.

In Example 21, the device, assembly, or method of any one of or anycombination of Examples 1-20 is optionally configured such that allelements or options recited are available to use or select from.

These and other examples and features of the present apparatuses andsystems will be set forth in part in the following Detailed Description.This Overview is intended to provide non-limiting examples of thepresent subject matter—it is not intended to provide an exclusive orexhaustive explanation. The Detailed Description below is included toprovide further information about the present apparatuses and methods.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, which are not necessarily drawn to scale, like numeralscan describe similar components in different views. Like numerals havingdifferent letter suffixes can represent different instances of similarcomponents. The drawings illustrate generally, by way of example, butnot by way of limitation, various examples discussed in the presentdocument.

FIG. 1 illustrates a perspective view of a trial spoon in accordancewith one example of the present disclosure.

FIG. 2 illustrates a partial perspective view of a trial spoon inaccordance with one example of the present disclosure.

FIG. 3 illustrates a cross-sectional schematic view of a trial spoon inaccordance with some examples of the present disclosure.

FIG. 4 illustrates a flow diagram of a method in accordance with oneexample of the present disclosure.

DETAILED DESCRIPTION

The present application relates to devices and systems for shoulderreplacement procedures, such as a reverse shoulder arthroplasty andtotal or an anatomical shoulder arthroplasty. Such procedures caninclude the use of trial components, which are installable prior toinstallation of the permanent prosthetic components. Trial componentscan be used to determine fit of the joint, such as the stability of thejoint, and can be used to select appropriately sized permanentprosthetic components.

FIG. 1 illustrates a perspective view of trial spoon 100, which caninclude handle 102, first end 104, second end 106, and user interface108. User interface 108 can include button 110 and display 112. Firstend 104 can include spoon 114 and second end 106 can include spoon 116.Also shown in FIG. 1 are orientation indicators Left and Right and forceF (shown as into the page).

Handle 102 can be an elongate body comprised of metal, plastic, and thelike. Handle 102 can be coupled to first end 104 at a left end of handle102. First end 104 and second end 106 can be comprised of plastic,metal, and the like. First end can 104 can include spoon 114, in someexamples. Spoon 114 can have a spoon shape, such as mated concave andconvex portions. Similarly, handle 102 can be coupled to second end 106at a right end of handle 102. Second end can 106 can include spoon 116,in some examples. Spoon 116 can have a spoon shape, such as matedconcave and convex portions. First end 104 and second end 106 can eachinclude a sensor configured to produce a sensor signal as a function ofa condition of their respective spoons, such as a force applied to thespoon, as discussed further below.

User interface 108 can include (in addition to button 110 and display112), a circuit board, controller, and other electronics required todisplay values on display 112, as discussed further below. Button 110can be a switch or other electrical component configured to receive userinput. Button 110 can be electrically connected to user interface 108.Also, sensors within each of spoons 114 and 116 can be connected to userinterface 108.

Display 112 can be a screen, such as a light emitting diode (LED)display, liquid crystal display (LCD), and the like. Display 112 can beelectrically connected to other components of user interface 108, suchas a controller and/or circuit board, as discussed further below.Display 112 can also be connected to sensors within spoons 114 and 116,and display 112 can be connected to button 110.

Further examples of operations and functions of spoon 100 are discussedin FIGS. 2-4 below.

FIG. 2 illustrates a partial perspective view of trial spoon 100, whichcan include handle 102, first end 104, second end 106 (not shown), anduser interface 108. User interface 108 can include button 110 anddisplay 112. First end 104 can include spoon 114 and second end 106 (notshown) can include spoon 116 (not shown). Also shown in FIG. 2 are trialcomponents 200, orientation indicators Left and Right, and force F(shown is into the page).

The components of trial spoon 100 shown in FIG. 2 are consistent withthose shown in FIG. 1; however, FIG. 2 further shows how trial spoon 100can be operated in some examples.

Trial components 200 can be trial components for a total (or anatomical)shoulder replacement (arthroplasty) or a reverse shoulder replacement.The trial components can be installable prior to installation of thepermanent prosthetic components and can be used to determine fit of thejoint, such as the stability of the joint, and can be used to selectappropriately sized later-installed permanent prosthetic components.

In operation of some examples, a user can use button 110 to turn on orenable user interface 106. In some example, button 110 can be used totoggle between displays, units of display, sensor signals to bedisplayed, as well as for other functions. Once user interface 106 isenabled, in some examples, such as the example shown in FIG. 1, force Fcan be applied to end 104 at spoon 114 by trial components 200. Force Fcan be detected by a sensor within end 104, which can produce a sensorsignal transmittable to user interface 106. User interface 106 cananalyze the signal, using a controller, processor, and the like, and canoutput a value that can be visually displayed on display 112.

In the example shown in FIG. 2, display 112 can display a value of 11 ona left side of display 112, proximate left end 104. The value shown ondisplay 112 can correspond to a signal produced by measuring force F,where the value displayed is in units of force, such as Newtons. Thatis, in the example of FIG. 2, display 112 indicates that force F appliedto spoon 114 is 11 Newtons. Also, because a force is not applied tosecond end 106 (not shown in FIG. 2), display 112 shows a value of 0Newtons proximate second end 106.

The values shown on display 112 representing forces applied to spoons114 and 116 can be analyzed by a physician to draw conclusions regardingthe operation of a shoulder. In some examples, the force values can beused to determine stability of an existing shoulder joint, trialcomponents temporarily installed in a shoulder joint, or permanentprosthetic components installed on the shoulder joint. In some examples,a physician can make adjustments to trial components or permanentcomponents as desired based on the analysis derived from the values. Insome examples, a physician can use the analysis derived from thedisplayed values to select permanent components. These selection andadjustment processes can improve the fit of the permanent prosthesis andthe stability of the shoulder, improving patient quality of life,improving procedural efficiency, and saving cost, in some examples.

FIG. 3 illustrates a cross-sectional schematic view of trial spoon 300,which can include handle 302, first end 304, second end 306, and userinterface 308. User interface 308 can include button 310, display 312,and printed circuit board (PCB) 318. First end 304 can include spoon 314and sensor 324. Second end 306 can include spoon 316 and sensor 326.Also shown in FIG. 3 are convex component 32, concave component 34,humerus 36, glenoid 38, and orientation indicators Left and Right, andforces F1 and F2. FIG. 3 depicts two different scenarios (one on theleft of FIG. 3 and one on the right of FIG. 3) that would notnecessarily occur at the same time.

The components of FIG. 3 can be connected and can operate consistentlywith the components of FIGS. 1 and 2; however, FIG. 3 shows additionaldetails of trial spoon 300 not shown in previous FIGS. and FIG. 3illustrates some examples the interaction of trial spoon 300 withcomponents of a shoulder.

PCB 318 can be physically coupled to display 312 and can be physicallycoupled to handle 302 and secured therein. PCB 318 can include anon-conductive substrate with an etched copper plate as a laminatedlayer that can provide the electrical connections of PCB 318, in someexamples. PCB 318 can also include a processor or controller that iselectrically connected to and secured by PCB 318. In some examples, PCB318 can additionally include other electronic components enablingreceipt, transmission, and analysis of signals and production of adisplay, such as capacitors and a communication circuit. PCB 318 canalso electrically connect to button 310. In some examples, button 310can be integral to (secured by and electrically connected to) PCB 318.PCB 318 can also electrically connect first sensor 324 and second sensor326, as shown in FIG. 3.

First sensor 324 and second sensor 326 can be disposed within spoons 314and 316, respectively. Each of first sensor 324 and second sensor 326can be sensors configured to produce a signal as a function of ameasured force, such as a hydraulic load cell, pneumatic load cell,strain load cell, and the like. In some examples, each of first sensor324 and second sensor 326 can be other types of sensors, such asproximity and displacement sensors configured to produce sensor signalsas a function of a sensed proximity and a sensed displacement,respectively. In some examples, first sensor 324 and second sensor 326can wirelessly connect to PCB 318 or to an external device, such as aremote controller or processing device. Wireless connectivity can beprovided through protocols such as WiFi, Bluetooth (Bluetooth LE),Near-Field Communications (NFC), and the like.

Each of spoons 314 and 316 can include a concave side and a convex sideconfigured to engage with either a set of trial or implant components,such as convex component 32 and concave component 34, or a humerus andglenoid, such as humerus 36 and glenoid 38.

Convex component 32 and concave component 34 can be trial components orpermanent implant components, such as those described above. The exampleshown in FIG. 3 displays convex component 32 as being a humeral trial orimplant and concave component 34 as being a glenoid or scapula trial orimplant, such as those commonly used in a total or anatomicalarthroplasty. However, in other examples, trail spoon 300 can interfacewith a concave humeral component and a convex glenoid components, suchas those used in a reverse shoulder arthroplasty. In some of theseexamples, a physician can insert trial spoon 300 to engage convexcomponent 32 and concave component 34, where trial spoon 300 can detectforces, such as force F1 transferred between convex component 32 andconcave component 34 and to spoon 314. Sensor 324 can produce a sensorsignal as a function of a detected force, which can be transmitted toPCB 318. PCB 318 can process the sensor signal and output a displaysignal as a function of the sensor signal, where the outputted displaysignal is transmitted from PCB 318 to display 312. Display 312 canconvert the display signal into a visual representation of the sensedforce, as shown in FIG. 2.

After receiving a visual readout from display 312 of forces detected byeither or both of first sensor 324 and 326, a physician can makeadjustments, such as trial component selection, implant selection, boneresections, and/or soft tissue adjustments, which can improve patientquality of life and can increase procedural efficiency.

Humerus 36 and glenoid 38 can be components of a human shoulder. Aconcave portion of spoons 316 and 314 can be configured to interfacewith humerus 36 and a convex portion of spoon 316 and 314 can beconfigured to interface with glenoid 38. In operation of some examples,trial spoon 300 can be used to detect forces, such as force F2,transferred between humerus 36 and glenoid 38 during some procedures,such as open stabilization procedures, and partial shoulderreplacements, or other procedures where a humerus and/or a glenoid isretained. In use of trial spoon 300 of these procedures, a physician caninsert trial spoon 300 between humerus 36 and glenoid 38 to detectforces transferred between humerus 36 and glenoid 38. After receiving avisual readout from display 312 of forces F1 or F2 detected by either offirst sensor 324 and 326, a physician can make adjustments, such as softtissue adjustments to the shoulder joint, which can improve patientquality of life and can increase procedural efficiency.

FIG. 4 illustrates method 400 of using the devices and systems describedabove, in accordance with at least one example of this disclosure. Thesteps or operations of method 400 are illustrated in a particular orderfor convenience and clarity; many of the discussed operations can beperformed in a different sequence or in parallel without materiallyimpacting other operations. Method 400 as discussed includes operationsthat may be performed by multiple different actors, devices, and/orsystems. It is understood that subsets of the operations discussed inmethod 400 attributable to a single actor, device, or system could beconsidered a separate standalone process or method. At step 402, method400 can begin with performing resections of bone and disconnections ofsoft tissue, such as from the humerus and the scapula. Soft tissue canalso be moved and disconnected at step 402, and other preparations tothe bones and soft tissues may be made. At step 404, the trialcomponents, such as glenoid components and humeral components consistentwith those described above, can be inserted into the humerus andglenoid.

Thereafter, at step 406, the physician can insert a trial spoon, such astrial spoons 100 or 300 described above, and the physician canarticulate the humerus relative to the glenoid. During this process,forces may be transferred between the glenoid component and humeralcomponent, as described above. The forces may be detected throughsensors within either or both of the first and second spoons, where thesensors can produce and transmit signals as a function of the sensedforces. At step 408, the sensors signals can be received at a processor,which can analyze the signals at step 410. The analysis can be displayedthrough graphic images, and can enable additional analysis. Based on theanalysis, the surgical procedure may be completed at step 414. Ifhowever, it is determined that the trial components, bones, or softtissues need adjustment, these adjustments may be performed at step 412.Therefore, steps 406-412 can be repeated until it is determined that thetrial components and tissue connections are adequate, at which time step414 can be performed. Step 414 can include removing trial components,inserting permanent components, reconnecting soft tissues, and closingthe incision.

This method offers the benefit of providing measurement data from atrial spoon that can be used to determine the quality of a proposedconnection and adequacy of trial components or selected implantcomponents. These methods can improve the efficiency of the procedureand can improve the longevity of the implant, by reducing potentiallydamaging forces from being transferred between the implant components.

ADDITIONAL NOTES

The above detailed description includes references to the accompanyingdrawings, which form a part of the detailed description. The drawingsshow, by way of illustration, specific embodiments in which theinvention can be practiced. These embodiments are also referred toherein as “examples.” Such examples can include elements in addition tothose shown or described. However, the present inventors alsocontemplate examples in which only those elements shown or described areprovided. Moreover, the present inventors also contemplate examplesusing any combination or permutation of those elements shown ordescribed (or one or more aspects thereof), either with respect to aparticular example (or one or more aspects thereof), or with respect toother examples (or one or more aspects thereof) shown or describedherein.

In this document, the terms “a” or “an” are used, as is common in patentdocuments, to include one or more than one, independent of any otherinstances or usages of “at least one” or “one or more.” In thisdocument, the term “or” is used to refer to a nonexclusive or, such that“A or B” includes “A but not B,” “B but not A,” and “A and B,” unlessotherwise indicated. In this document, the terms “including” and “inwhich” are used as the plain-English equivalents of the respective terms“comprising” and “wherein.” Also, in the following claims, the terms“including” and “comprising” are open-ended, that is, a system, device,article, composition, formulation, or process that includes elements inaddition to those listed after such a term in a claim are still deemedto fall within the scope of that claim. Moreover, in the followingclaims, the terms “first,” “second,” and “third,” etc. are used merelyas labels, and are not intended to impose numerical requirements ontheir objects.

The above description is intended to be illustrative, and notrestrictive. For example, the above-described examples (or one or moreaspects thereof) can be used in combination with each other. Otherexamples can be used, such as by one of ordinary skill in the art uponreviewing the above description. The Abstract is provided to comply with37 C.F.R. § 1.72(b), to allow the reader to quickly ascertain the natureof the technical disclosure. It is submitted with the understanding thatit will not be used to interpret or limit the scope or meaning of theclaims. Also, in the above detailed description, various features can begrouped together to streamline the disclosure. This should not beinterpreted as intending that an unclaimed disclosed feature isessential to any claim. Rather, inventive subject matter can lie in lessthan all features of a particular disclosed example. Thus, the followingclaims are hereby incorporated into the detailed description as examplesor embodiments, with each claim standing on its own as a separateexample, and it is contemplated that such examples can be combined witheach other in various combinations or permutations. The scope of theinvention should be determined with reference to the appended claims,along with the full scope of equivalents to which such claims areentitled.

The invention claimed is:
 1. An arthroplasty trial tool for a humanshoulder comprising: a handle comprising a first end and a second endopposite the first end, the first end comprising: a first sensorconfigured to produce a first sensor signal based on a sensed conditionof the human shoulder when the first end engages a humeral-glenoidinterface of the human shoulder; and a user interface disposed on thehandle between the first end and the second end, the user interfaceconfigured to display a first value indicative of stability of theshoulder based on the first sensor signal; wherein the second endfurther comprises a second sensor configured to produce a second sensorsignal based on a second sensed condition of the human shoulder when thesecond end engages the humeral-glenoid interface, the second sensorsignal indicative of stability of the shoulder.
 2. The arthroplastytrial tool of claim 1, wherein the user interface is configured todisplay a second value based on the second sensor signal.
 3. Thearthroplasty trial tool of claim 1, wherein at least one of the firstsensor and the second sensor comprises a force sensor.
 4. Thearthroplasty trial tool of claim 3, wherein the user interface isconfigured to display a force value based on at least one of the firstsensor signal and the second sensor signal, wherein the force value isindicative of stability of the humeral-glenoid interface.
 5. Thearthroplasty trial tool of claim 1, the user interface furthercomprising: a light emitting diode (LED) display configured to display anumerical value representing at least one of the first sensor signal andthe second sensor signal.
 6. The arthroplasty trial tool of claim 5,wherein the LED display is configured to display a first numerical valuerepresenting the first sensor signal and a second numerical valuerepresenting the second sensor signal.
 7. The arthroplasty trial tool ofclaim 1, wherein the first end comprises a first size that is differentfrom a second size of the second end.
 8. The arthroplasty trial tool ofclaim 1, the first end further comprising: a convex side engageable witha concave portion of the humeral-glenoid interface; and a concave sideengageable with a convex portion of the humeral-glenoid interface. 9.The arthroplasty trial tool of claim 1, wherein the humeral-glenoidinterface comprises one or more trial components associated with ashoulder replacement prosthesis.
 10. An arthroplasty trial system for ahuman shoulder, the trial system comprising: a set of implantscomprising a humeral implant and a glenoid implant; a trial toolcomprising: a body comprising a first end and a second end; a spooncoupled to the first end, the spoon engageable with the set of implants,the spoon comprising: a sensor to produce a sensor signal based on acondition of the set of implants when the spoon engages the set ofimplants; a user interface located on the body and configured to, basedon the first sensor signal, display a value indicative of the conditionof the set of implants; and a second spoon coupled to the second end ofthe body, the second spoon including a second sensor configured toproduce a second sensor signal based on a second condition of the set ofimplants when the second spoon engages the set of implants.
 11. Thearthroplasty trial system of claim 10, wherein the value displayed is aforce value indicative of stability of the human shoulder including theset of implants.
 12. The arthroplasty trial system of claim 10, whereinthe user interface is configured to display a second value based on thesecond sensor signal, the displayed second value indicative of stabilityof the human shoulder including the set of implants.
 13. Thearthroplasty trial system of claim 10, wherein the first spoon comprisesa first size that is different from a second size of the second spoon.14. The arthroplasty trial system of claim 10, further comprising: asecond set of implants comprising a second humeral implant and a secondglenoid implant, the second humeral implant having a second humeralimplant size that is different than a size of the humeral implant. 15.The arthroplasty trial system of claim 14, wherein the first spoon isconfigured to engage the second set of implants to produce a secondsensor signal based on a second condition of the second set of implants.16. A method of evaluating trial components, comprising: inserting afirst end of a trial tool into a shoulder of patient adjacent to a firsttrial component; producing a first sensor signal based on a condition ofthe first trial component installed on the shoulder using the trialtool; producing, based on the first sensor signal, a display on thetrial tool representing the condition of the first trial componentindicative of stability of the shoulder; selecting the first trialcomponent based on the display; securing the first trial component to aglenoid of the shoulder of the patient; securing a second trialcomponent to a humerus of the shoulder of the patient; and producing afirst sensor signal based on a condition of the first trial componentand the second trial component using a first end of the trial tool; andproducing a second sensor signal based on a condition of the first trialcomponent and the second trial component using a second end of the trialtool.
 17. The method of claim 16, further comprising: producing, basedon the second sensor signal, a display representing the condition of thefirst trial component and the second trial component using the secondend of the trial tool.
 18. The method of claim 16, further comprising:adjusting the first trial component based on the display, whereinadjusting the first trial component comprises one or more of moving thefirst trial component, rotating the first trial component, moving thesecond trial component, rotating the second trial component, inserting anew first trial component, and inserting a new second trial component.